/*      $NetBSD: el.c,v 1.21 2001/01/05 22:45:30 christos Exp $ */

/*-
 * Copyright (c) 1992, 1993
 *      The Regents of the University of California.  All rights reserved.
 *
 * This code is derived from software contributed to Berkeley by
 * Christos Zoulas of Cornell University.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *      This product includes software developed by the University of
 *      California, Berkeley and its contributors.
 * 4. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 */

#include "compat.h"
#if !defined(lint) && !defined(SCCSID)
#if 0
static char sccsid[] = "@(#)el.c        8.2 (Berkeley) 1/3/94";
#else
__RCSID("$NetBSD: el.c,v 1.21 2001/01/05 22:45:30 christos Exp $");
#endif
#endif /* not lint && not SCCSID */

/*
 * el.c: EditLine interface functions
 */
#include "sys.h"

#include <sys/types.h>
#include <sys/param.h>
#include <string.h>
#include <stdlib.h>
#include <stdarg.h>
#include "el.h"

/* el_init():
 *      Initialize editline and set default parameters.
 */
public EditLine *
el_init(const char *prog, FILE *fin, FILE *fout, FILE *ferr)
{

        EditLine *el = (EditLine *) el_malloc(sizeof(EditLine));
#ifdef DEBUG
        char *tty;
#endif

        if (el == NULL)
                return (NULL);

        memset(el, 0, sizeof(EditLine));

        el->el_infd = fileno(fin);
        el->el_outfile = fout;
        el->el_errfile = ferr;
        el->el_prog = XSTRDUP (0, prog);

        /*
         * Initialize all the modules. Order is important!!!
         */
        el->el_flags = 0;

        (void) term_init(el);
        (void) key_init(el);
        (void) map_init(el);
        if (tty_init(el) == -1)
                el->el_flags |= NO_TTY;
        (void) ch_init(el);
        (void) search_init(el);
        (void) hist_init(el);
        (void) prompt_init(el);
        (void) sig_init(el);

        return (el);
}


/* el_end():
 *      Clean up.
 */
public void
el_end(EditLine *el)
{

        if (el == NULL)
                return;

        el_reset(el);

        term_end(el);
        key_end(el);
        map_end(el);
        tty_end(el);
        ch_end(el);
        search_end(el);
        hist_end(el);
        prompt_end(el);
        sig_end(el);

        el_free((ptr_t) el->el_prog);
        el_free((ptr_t) el);
}


/* el_reset():
 *      Reset the tty and the parser
 */
public void
el_reset(EditLine *el)
{

        tty_cookedmode(el);
        ch_reset(el);           /* XXX: Do we want that? */
}


/* el_set():
 *      set the editline parameters
 */
public int
el_set(EditLine *el, int op, ...)
{
        va_list va;
        int rv;

        if (el == NULL)
                return (-1);

        va_start(va, op);

        switch (op) {
        case EL_PROMPT:
        case EL_RPROMPT:
                rv = prompt_set(el, va_arg(va, el_pfunc_t), op);
                break;

        case EL_TERMINAL:
                rv = term_set(el, va_arg(va, char *));
                break;

        case EL_EDITOR:
                rv = map_set_editor(el, va_arg(va, char *));
                break;

        case EL_SIGNAL:
                if (va_arg(va, int))
                        el->el_flags |= HANDLE_SIGNALS;
                else
                        el->el_flags &= ~HANDLE_SIGNALS;
                rv = 0;
                break;

        case EL_BIND:
        case EL_TELLTC:
        case EL_SETTC:
        case EL_ECHOTC:
        case EL_SETTY:
        {
                char *argv[20];
                int i;

                for (i = 1; i < 20; i++)
                        if ((argv[i] = va_arg(va, char *)) == NULL)
                                break;

                switch (op) {
                case EL_BIND:
                        argv[0] = "bind";
                        rv = map_bind(el, i, argv);
                        break;

                case EL_TELLTC:
                        argv[0] = "telltc";
                        rv = term_telltc(el, i, argv);
                        break;

                case EL_SETTC:
                        argv[0] = "settc";
                        rv = term_settc(el, i, argv);
                        break;

                case EL_ECHOTC:
                        argv[0] = "echotc";
                        rv = term_echotc(el, i, argv);
                        break;

                case EL_SETTY:
                        argv[0] = "setty";
                        rv = tty_stty(el, i, argv);
                        break;

                default:
                        rv = -1;
                        EL_ABORT((el->el_errfile, "Bad op %d\n", op));
                        break;
                }
                break;
        }

        case EL_ADDFN:
        {
                char *name = va_arg(va, char *);
                char *help = va_arg(va, char *);
                el_func_t func = va_arg(va, el_func_t);

                rv = map_addfunc(el, name, help, func);
                break;
        }

        case EL_HIST:
        {
                hist_fun_t func = va_arg(va, hist_fun_t);
                ptr_t ptr = va_arg(va, char *);

                rv = hist_set(el, func, ptr);
                break;
        }

        case EL_EDITMODE:
                if (va_arg(va, int))
                        el->el_flags &= ~EDIT_DISABLED;
                else
                        el->el_flags |= EDIT_DISABLED;
                rv = 0;
                break;

        default:
                rv = -1;
        }

        va_end(va);
        return (rv);
}


/* el_get():
 *      retrieve the editline parameters
 */
public int
el_get(EditLine *el, int op, void *ret)
{
        int rv;

        if (el == NULL || ret == NULL)
                return (-1);
        switch (op) {
        case EL_PROMPT:
        case EL_RPROMPT:
                rv = prompt_get(el, (el_pfunc_t *) & ret, op);
                break;

        case EL_EDITOR:
                rv = map_get_editor(el, (const char **) &ret);
                break;

        case EL_SIGNAL:
                *((int *) ret) = (el->el_flags & HANDLE_SIGNALS);
                rv = 0;
                break;

        case EL_EDITMODE:
                *((int *) ret) = (!(el->el_flags & EDIT_DISABLED));
                rv = 0;
                break;

#if 0                           /* XXX */
        case EL_TERMINAL:
                rv = term_get(el, (const char *) &ret);
                break;

        case EL_BIND:
        case EL_TELLTC:
        case EL_SETTC:
        case EL_ECHOTC:
        case EL_SETTY:
        {
                char *argv[20];
                int i;

                for (i = 1; i < 20; i++)
                        if ((argv[i] = va_arg(va, char *)) == NULL)
                                break;

                switch (op) {
                case EL_BIND:
                        argv[0] = "bind";
                        rv = map_bind(el, i, argv);
                        break;

                case EL_TELLTC:
                        argv[0] = "telltc";
                        rv = term_telltc(el, i, argv);
                        break;

                case EL_SETTC:
                        argv[0] = "settc";
                        rv = term_settc(el, i, argv);
                        break;

                case EL_ECHOTC:
                        argv[0] = "echotc";
                        rv = term_echotc(el, i, argv);
                        break;

                case EL_SETTY:
                        argv[0] = "setty";
                        rv = tty_stty(el, i, argv);
                        break;

                default:
                        rv = -1;
                        EL_ABORT((el->errfile, "Bad op %d\n", op));
                        break;
                }
                break;
        }

        case EL_ADDFN:
        {
                char *name = va_arg(va, char *);
                char *help = va_arg(va, char *);
                el_func_t func = va_arg(va, el_func_t);

                rv = map_addfunc(el, name, help, func);
                break;
        }

        case EL_HIST:
                {
                        hist_fun_t func = va_arg(va, hist_fun_t);
                        ptr_t ptr = va_arg(va, char *);
                        rv = hist_set(el, func, ptr);
                }
                break;
#endif /* XXX */

        default:
                rv = -1;
        }

        return (rv);
}


/* el_line():
 *      Return editing info
 */
public const LineInfo *
el_line(EditLine *el)
{

        return (const LineInfo *) (void *) &el->el_line;
}

static const char elpath[] = "/.editrc";

/* el_source():
 *      Source a file
 */
public int
el_source(EditLine *el, const char *fname)
{
        FILE *fp;
        size_t len;
        char *ptr, path[MAXPATHLEN];

        fp = NULL;
        if (fname == NULL) {
                if (issetugid())
                        return (-1);
                if ((ptr = getenv("HOME")) == NULL)
                        return (-1);
                if (strlcpy(path, ptr, sizeof(path)) >= sizeof(path))
                        return (-1);
                if (strlcat(path, elpath, sizeof(path)) >= sizeof(path))
                        return (-1);
                fname = path;
        }
        if (fp == NULL)
                fp = fopen(fname, "r");
        if (fp == NULL)
                return (-1);

        while ((ptr = fgetln(fp, &len)) != NULL) {
                if (len > 0 && ptr[len - 1] == '\n')
                        --len;
                ptr[len] = '\0';
                if (parse_line(el, ptr) == -1) {
                        (void) fclose(fp);
                        return (-1);
                }
        }

        (void) fclose(fp);
        return (0);
}


/* el_resize():
 *      Called from program when terminal is resized
 */
public void
el_resize(EditLine *el)
{
        int lins, cols;
        sigset_t oset, nset;

        (void) sigemptyset(&nset);
        (void) sigaddset(&nset, SIGWINCH);
        (void) sigprocmask(SIG_BLOCK, &nset, &oset);

        /* get the correct window size */
        if (term_get_size(el, &lins, &cols))
                term_change_size(el, lins, cols);

        (void) sigprocmask(SIG_SETMASK, &oset, NULL);
}


/* el_beep():
 *      Called from the program to beep
 */
public void
el_beep(EditLine *el)
{

        term_beep(el);
}


/* el_editmode()
 *      Set the state of EDIT_DISABLED from the `edit' command.
 */
protected int
/*ARGSUSED*/
el_editmode(EditLine *el, int argc, char **argv)
{
        const char *how;

        if (argv == NULL || argc != 2 || argv[1] == NULL)
                return (-1);

        how = argv[1];
        if (strcmp(how, "on") == 0)
                el->el_flags &= ~EDIT_DISABLED;
        else if (strcmp(how, "off") == 0)
                el->el_flags |= EDIT_DISABLED;
        else {
                (void) fprintf(el->el_errfile, "edit: Bad value `%s'.\n", how);
                return (-1);
        }
        return (0);
}
